Portable Mobile Transmitter cell phone signal jammer Check the main unit power switch, make sure the power switch is in the off position, insert the output plug of the power transformer into the left side of the main unit power socket, and then switch the power supply. Built-in Antenna Portable Test Room Phone Signal Shielding Device/Device Full Band 2G 3G4G Network Signal Shielding Signal Including CDMA, GSM, DCS, PHS, SCDMA, 3G, 4G and Wifi Portable Cell Phone Jammer Bluetooth/2.4G Communication, Wireless Network (QQ and Weibo, etc.) signal 3G jammer performance characteristics, eliminate the use of mobile phones to cheat candidates, ensure that candidates take the test fairly, and create a completely fair competitive environment.
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